Trane Voyager Commercial, Инструкция по установке, эксплуатации и обслуживанию

Страница: 49 / 156

RT-SVX34R-EN 49
Table 26. Fan output - high efficiency (continued)
Function
Minimum Fan Output %
Cool 1 45%
Cool 2 58%
Cool 3 67%
Cool 4 75%
Cool 5 75%
SZVAV Modulating Heat
58%
CV Staged Heat
100%
SZVAV Modulating Heat
Tempering
58%
CV Staged Heat Tempering
100%
Modulating Reheat
80%
Supply Fan Mode Operation
Units configured for Single Zone VAV control will
utilize Supply Fan Mode selection as is currently
implemented into ReliaTel controls for normal Zone
Control and will be selectable between AUTO and ON
via a connected Zone Sensor module or through BAS/
Network controllers.
Supply Fan Mode “Auto” Operation
For active Cooling, Heating, and Hot Gas Reheat
operation the Supply Fan will be commanded ON and
will ramp up to the appropriate minimum speed once
the unit determines that there is a request for capacity
control. Once the active request is cleared and all
capacity is de-energized normal supply fan off delays
as implemented on constant volume units will be in
effect. During the Supply Fan Off-Delay, the supply fan
will remain energized for the predetermined time at the
previous unit function's minimum speed. All other
cases which would bring the Supply Fan ON will
function as on non-Single Zone VAV units.
Supply Fan Mode “ON” Operation
For active unit control with the Supply Fan Mode set to
ON, the unit will energize the Supply Fan and hold the
Fan Speed output at minimum speed until there is a
request for the fan speed to increase. This will hold true
for all cases except during Unoccupied periods in
which the Supply Fan Mode is forced to AUTO and will
operate the Supply Fan as described above for all
Cooling, Heating, and Hot Gas Reheat requests.
Setpoint Arbitration
Single Zone VAV units will require traditional Zone
Heating (if heat installed) and Cooling setpoints that
are used for constant volume units in addition to two
new setpoints: Discharge Air Cool (DA Cool - Fan SPD)
and Discharge Air Heat (DA Heat) Setpoint limits. The
zone Heating and Cooling setpoints will be selectable
via the existing RTRM customer connections for a zone
sensor panel and the DA Heat and Cool setpoints will
be customer selectable via two onboard
potentiometers on the RTOM with ranges 50-150°F and
40-90°F respectively.
Table 27, p. 49 and Table 28, p. 49 can be used as a
reference when setting the DA Heat (R42) and DA Cool -
Fan SPD (R136) setpoints on the RTOM.
N No otte e:: The recommended settings for these setpoints is
100°F for the DA Heat Setpoint and 50°F for the
DA Cool - Fan SPD Setpoint.
Table 27. DA cool - fan SPD setpoint
°F VDC
40 <0.1
41 0.2
42 0.3
43 0.45
44 0.55
45 0.7
46 0.8
47 0.95
48 1.05
49 1.15
50 1.25
51 1.3
52 1.35
53 1.45
54 1.55
55 1.65
56 1.7
57 1.75
58 1.83
59 1.9
60 1.95
61 2
62 2.05
63 2.1
64 2.13
65 2.17
66 2.21
67 2.27
68 2.3
69 2.35
70 >2.40
Note: The potentiometer
voltage readings can be
verified via the
provided test points
located next to each
potentiometer. Use a
DC voltmeter to the Vdc
reading between those
points and common.
Table 28. DA heat setpoint
Voltage (Vdc) Setpoint (ºF)
0 50
0.09 51
0.13 52
0.16 53
0.2 54
0.24 55
0.28 56
S Stta arrttu up p